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Finding the Fourth Proportional to 578.98, 868.78 and 254.37

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Solution

The fourth proportional to 578.98, 868.78 and 254.37 is: 381.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.98 : 868.78 = 254.37 : x
  2. Step 2: Convert to fraction form
    578.98/868.78 = 254.37/x
  3. Step 3: Cross multiply
    578.98x = 868.78 × 254.37
  4. Step 4: Simplify right side
    578.98x = 220,991.57
  5. Step 5: Solve for x
    x = 220,991.57/578.98
  6. Step 6: Final answer
    x = 381.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.